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Réparation d’un climatiseur mural Fujitsu à Rosemont–La Petite-Patrie
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Fujitsu wall-mounted air conditioner repair in Rosemont–La Petite-Patrie

An aging unit refurbished by AirGreen

At AirGreen , we recently received an HVAC service call for a Fujitsu wall-mounted air conditioner repair in a charming residence in the Rosemont–La Petite-Patrie neighborhood of Montreal . The customer reported that their unit, installed for over ten years, was no longer producing cold air, was emitting a slight humming noise, and seemed to be suffering from a gradual loss of efficiency.

Initial inspection and complete diagnosis

Upon our arrival, our technicians noticed that the wall-mounted unit showed signs of advanced wear : slightly obstructed air blades, a cover weakened by time, and a layer of dust accumulated inside the exchanger.
Using an infrared thermometer , we found an air outlet temperature of 19°C , well above the expected standard of 7-9°C for a working air conditioner.

The diagnosis was based on the following points:

  • Very dirty air filters , blocking airflow.

  • Clogged evaporator , reducing heat exchange.

  • Interior fan partially blocked by dust.

  • Refrigerant pressure below normal values, suggesting a microleak in the circuit .

  • Control board still functional, which ruled out an electronic problem.

Repair and upgrade steps

Our team has undertaken a complete, step-by-step recommissioning :

  1. Complete cleaning of the indoor unit with a biodegradable product specific to residential HVAC systems.

  2. Partial disassembly of the crankcase to access the evaporator and remove dust and grease deposits.

  3. Checking the refrigeration circuit using an electronic detector: identification of a micro-leak on the flare connection on the outdoor unit side.

  4. Tightened the fitting and tested for leaks with nitrogen for 45 minutes, with no leaks detected.

  5. Recharge with R410A refrigerant according to Fujitsu specifications.

  6. Final performance test : outlet air temperature stabilized at 7.4°C , confirming return to optimal performance.

Results and recommendations to the client

Thanks to this intervention, the Fujitsu wall-mounted air conditioner regained its full efficiency. The customer immediately noticed an improvement in comfort and a reduction in ambient noise.
We provided him with a detailed maintenance report , along with specific recommendations for extending the life of his device:

  • Clean filters every 4 to 6 weeks.

  • Inspection of the condensate drainage system to prevent overflows.

  • Annual preventative maintenance including refrigerant check and coil cleaning.

  • Preventive replacement of the starting capacitor in 1 to 2 years, taking into account the age of the system.

AirGreen: expertise and rigor in Montreal

This type of intervention illustrates our approach well: an accurate diagnosis, a lasting repair and a transparent service .
At AirGreen , we operate throughout Greater Montreal — from Rosemont to Outremont, from the Plateau to the Southwest , as well as on the North Shore, the South Shore and Laval — to ensure the performance, safety and durability of your air conditioning and wall-mounted heat pump systems.

Our RBQ and CCQ certified technicians apply strict protocols for every service call, ensuring repairs comply with manufacturer requirements and provincial standards.

In summary

This Fujitsu wall-mounted air conditioner repair in Rosemont once again demonstrates the importance of preventative maintenance and technical expertise. By revitalizing an older unit, we helped the customer avoid costly replacement and extend the life of their HVAC system by several years.